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BMW 3-Series (E90 E92) Forum
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Bmw 335IS Performance Upgrade help
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01-27-2013, 02:18 AM | #2 |
Lieutenant
27
Rep 566
Posts |
With JB4, you're able to completely turn off the tune before you take it into the dealer, or you can take the whole tune off..
I'm not sure if there's much to do if you're afraid of losing your warranty |
Appreciate
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